mystr = "hello world and itcast and it and Pythor"
 #split(分割字符，num)分割返回一个列表
# list1 = mystr.split('and')
# print(list1)
# list1 = mystr.split(" and",2)
# print(list1)
list1 = mystr.split('...')
print(list1)#没有任何效果
# list1= mystr.split()
# print(list1)#以空格进行分割

